He had considered it. He had a lot of time to consider countless things, even now. Faith in others - he had lost that many centuries ago. Willingness to swap allegiances and break oaths - that was evidence enough that nothing was ever sound in their day and age, and even more so today.
Her husband. Funny she should say that. He had made his choice, and he had paid the price for it, and even now he remained unwavering in his decisions. That was a man Cronus respected. That was a titan.
They weren't children anymore. The choices they make mattered thousands of years ago and they still matter today.
As with just about everything else, he took her words at face value. After all, there seemed to be little use in swearing by something that could no longer hold oaths. Trust was earned, not sold in two words between the legs of a disease-ridden whore.